Quantum System Identification
Abstract
The aim of quantum system identification is to estimate the ingredients inside a black box, in which some quantum-mechanical unitary process takes place, by just looking at its input-output behavior. Here we establish a basic and general framework for quantum system identification, that allows us to classify how much knowledge about the quantum system is attainable, in principle, from a given experimental setup. Prior knowledge on some elements of the black box helps the system identification. We present an example in which a Bell measurement is more efficient to identify the system. When the topology of the system is known, the framework enables us to establish a general criterion for the estimability of the coupling constants in its Hamiltonian.
Cite
@article{arxiv.1104.0583,
title = {Quantum System Identification},
author = {Daniel Burgarth and Kazuya Yuasa},
journal= {arXiv preprint arXiv:1104.0583},
year = {2012}
}